Journal ArticleDOI
A perovskite oxide optimized for oxygen evolution catalysis from molecular orbital principles.
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TLDR
The high activity of BSCF was predicted from a design principle established by systematic examination of more than 10 transition metal oxides, which showed that the intrinsic OER activity exhibits a volcano-shaped dependence on the occupancy of the 3d electron with an eg symmetry of surface transition metal cations in an oxide.Abstract:
The efficiency of many energy storage technologies, such as rechargeable metal-air batteries and hydrogen production from water splitting, is limited by the slow kinetics of the oxygen evolution reaction (OER). We found that Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3–δ (BSCF) catalyzes the OER with intrinsic activity that is at least an order of magnitude higher than that of the state-of-the-art iridium oxide catalyst in alkaline media. The high activity of BSCF was predicted from a design principle established by systematic examination of more than 10 transition metal oxides, which showed that the intrinsic OER activity exhibits a volcano-shaped dependence on the occupancy of the 3d electron with an e g symmetry of surface transition metal cations in an oxide. The peak OER activity was predicted to be at an e g occupancy close to unity, with high covalency of transition metal–oxygen bonds.read more
Citations
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Journal ArticleDOI
Revised Oxygen Evolution Reaction Activity Trends for First-Row Transition-Metal (Oxy)hydroxides in Alkaline Media
Michaela S. Burke,Shihui Zou,Lisa J. Enman,Jaclyn E. Kellon,Christian A. Gabor,Erica Pledger,Shannon W. Boettcher +6 more
TL;DR: A new OER activity trend for nominally oxyhydroxide thin films of Ni( Fe)O(x)H(y) > Co(Fe)O-AuO-H(Y) > FeO (x) H(y)-Au O(x), described to provide a basis for comparison to theory and help guide the design of improved catalyst systems.
Journal ArticleDOI
Ca2Mn2O5 as Oxygen-Deficient Perovskite Electrocatalyst for Oxygen Evolution Reaction
TL;DR: It is demonstrated that oxygen-deficient perovskite, A2B2O5, is a new class of high performance electrocatalyst for those reactions that involve active oxygen intermediates, such as reduction of oxygen and OER in water splitting.
Journal ArticleDOI
Co Nanoislands Rooted on Co-N-C Nanosheets as Efficient Oxygen Electrocatalyst for Zn-Air Batteries.
Peng Yu,Lei Wang,Fanfei Sun,Ying Xie,Xu Liu,Jingyuan Ma,Xiuwen Wang,Chungui Tian,Jinghong Li,Honggang Fu +9 more
TL;DR: The synthesis of Co nanoislands rooted on Co-N-C nanosheets supported by carbon felts (Co/Co-N/C) is reported, which leads to good bifuctional catalytic performances of Zn-air batteries.
Journal ArticleDOI
Single‐Site Active Cobalt‐Based Photocatalyst with a Long Carrier Lifetime for Spontaneous Overall Water Splitting
Wei Liu,Linlin Cao,Weiren Cheng,Yuanjie Cao,Xiaokang Liu,Wei Zhang,Xiaoli Mou,Lili Jin,Xusheng Zheng,Wei Che,Qinghua Liu,Tao Yao,Shiqiang Wei +12 more
TL;DR: A single Co1 -P4 site confined on g-C3 N4 nanosheets was prepared by a facile phosphidation method, and identified by electron microscopy and X-ray absorption spectroscopy to effectively suppress charge recombination and prolong carrier lifetime by about 20 times, and boost water molecular adsorption and activation for oxygen evolution.
Journal ArticleDOI
A review of cathode materials and structures for rechargeable lithium–air batteries
TL;DR: In this article, the role of the cathode in non-aqueous Li-air batteries including the reaction mechanisms and the properties and morphologies of cathode materials, followed by approaches to optimize cathode performance.
References
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Building better batteries
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Journal ArticleDOI
Powering the planet: Chemical challenges in solar energy utilization
Nathan S. Lewis,Daniel G. Nocera +1 more
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Journal ArticleDOI
Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs
TL;DR: In this article, the authors quantified the activities and voltage loss modes for state-of-the-art MEAs (membrane electrode assemblies), specifies performance goals needed for automotive application, and provides benchmark oxygen reduction activities for state of the art platinum electrocatalysts.
Journal ArticleDOI
Improved Oxygen Reduction Activity on Pt3Ni(111) via Increased Surface Site Availability
Vojislav R. Stamenkovic,Vojislav R. Stamenkovic,Ben Fowler,Bongjin Simon Mun,Guofeng Wang,Philip N. Ross,Chris Lucas,Nenad M. Markovic +7 more
TL;DR: It is demonstrated that the Pt3Ni( 111) surface is 10-fold more active for the ORR than the corresponding Pt(111) surface and 90-foldMore active than the current state-of-the-art Pt/C catalysts for PEMFC.
Journal ArticleDOI
In Situ Formation of an Oxygen-Evolving Catalyst in Neutral Water Containing Phosphate and Co2+
TL;DR: A catalyst that forms upon the oxidative polarization of an inert indium tin oxide electrode in phosphate-buffered water containing cobalt (II) ions is reported that not only forms in situ from earth-abundant materials but also operates in neutral water under ambient conditions.